diff --git a/Dockerfile b/Dockerfile
index 51b850c..34d929c 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,8 +1,6 @@
 FROM openjdk:21
 ARG JAR_FILE=build/libs/earlybird-server.jar
 COPY ${JAR_FILE} app.jar
-RUN apt-get update && apt-get install -y tzdata \
-    && ln -snf /usr/share/zoneinfo/Asia/Seoul /etc/localtime \
-    && echo "Asia/Seoul" > /etc/timezone
+RUN sudo ln -snf /usr/share/zoneinfo/Asia/Seoul /etc/localtime
 EXPOSE 8080
 ENTRYPOINT ["java", "-jar", "/app.jar"]
\ No newline at end of file